Photovoltaics:

 Solar Electricity and Solar Cells in Theory and Practice

The word Photovoltaic is a combination of the Greek word for Light and the name of the physicist Allesandro Volta. It identifies the direct conversion of sunlight into energy by means of solar cells. The conversion process is based on the photoelectric effect discovered by Alexander Bequerel in 1839. The photoelectric effect describes the release of positive and negative charge carriers in a solid state when light strikes its surface.

Solar Collectors: Different Types and Fields of Application

Solar collectors transform solar radiation into heat and transfer that heat to a medium (water, solar fluid, or air). Then solar heat can be used for electical invertor systems,heating water, to back up heating systems or for heating swimming pools.

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